In the water of numerous thermal and cold springs in the Kalbajar region of Azerbaijan, radioactive radon was determined in different concentrations, and uranium isotopes were found in the soil of the locations of these springs in the same proportions as in natural uranium deposits. Uranium isotopes were transferred from soil samples to solutions. The regularities of adsorption from solutions of uranium isotopes on the surfaces of various adsorbents are studied. The results of studies of isotope sorption from aqueous solutions on various adsorbents showed high adsorption properties of DOWEX HCR S/S granular elastomer, activated carbon and expanded clay. The activation energies of desorption of uranium isotopes from the surface of adsorbents were also determined. Relatively low values (22.1 - 26.3 kJ/mol) of the activation energy of desorption of uranium isotopes from the surface of adsorbents indicate the absence of the chemical nature of sorption and the presence of only weak Van der Waals forces between the absorbed isotopes and the surface of the adsorbents in solutions.
References
[1]
McKay, W.A. and Pattenden, N.J. (1990) The Transfer of Radionuclides from Sea Land via the Air: A Review. Journal of Environmental Radioactivity, 12, 49-77.
https://doi.org/10.1016/0265-931X(90)90035-T
[2]
Simon, H.A., Gudiksen, P., Khitrov, L., Rodhe, H. and Yoshikawa, T. (1988) Modeling the Dispersal and Deposition of Radionuclides. Environment, 30, 17-20.
https://doi.org/10.1080/00139157.1988.9928919
[3]
Mattson, L.J.S. (1975) Deposition, Retention and Internal Distribution of the 155Eu, 144Ce, 125Sb, 106Ru, 95Zr, 54Mn and 7Be in the Reindeer Lichen Cladonia Alpestris, 1961-1970. Health Physics, 29, 27-41.
https://doi.org/10.1097/00004032-197507000-00004
[4]
Mollan, A.S., Rahman, M.M. and Husain, S.R. (1986) Distribution of Y-Emitting Radionuclides in Soils at the Atomic Energy Research Establishment, Savor, Bangladesh. Health Physics, 50, 85-88.
[5]
Lu, X.W., Zhao, C.F., Chen, C.C. and Liu, W. (2012) Radioactivity Level of Soil around Baqiao Coal-Fired Power Plant in China. Radiation Physics and Chemistry, 81, 1827-1832. https://doi.org/10.1016/j.radphyschem.2012.07.013
[6]
Mammadov, Kh. (2020) Effect of Natural Radionuclides on the Processes Occur in the Environmental Objects. Studying the Cleaning Methods of Water Contaminated with Organic Emissions and the Methods for Cleaning of Soil Contaminated with Heavy Metals and Radionuclides. International Journal of Applied Chemistry, 7, 18-24. https://doi.org/10.14445/23939133/IJAC-V7I1P105
[7]
Mamedov, Kh.F. and Shiraliyeva, H.N. (2020) Purification of Soil from Natural Isotopes. Journal of Radiation Researches, 2, 62-69.
[8]
Mamedov, Kh.F. (2014) Radiolysis and Photolysis of Water Solutions of Phenol. European Researcher. Series A, 7, 1216-1236.
https://doi.org/10.13187/issn.2219-8229
[9]
Mammadov, Kh. (2012) Radiolytic Destruction of Aflatoxin in Damp Mixed Fodders. Proceedings of 12th World Congress on Environmental Health, Vilnius, 22-27 May 2012, 23-25.
[10]
Mammadov, Kh. (2012) Radiolytical Destruction of Nivalenole in Pumpkin Seeds. Scientific Notes of the Crimean Federal University Named after VI Vernadsky. Biology Chemistry, 25, 289-293.
[11]
Mammadov, Kh. (2014) Effective Processes for the Decomposition of Xenobiotics and Natural Toxins. LAP, LAMBERT Academic Publishing, Saarbrücken, 419.
[12]
Mamedov, Kh.F., Aliev, A.G., Mamedova, N.A. and Badalova, A.R. (2015) Radiolysis of 2,3,7,8-Tetrachlorodibenzo-p-Dioxin in Water Solutions. Journal of Physical Chemstry A, 89, 1707-1709. https://doi.org/10.1134/S0036024415090228
[13]
Mamedov, Kh.F. (2014) Radiolytic Conversion of Natural Toxins in Contaminated Plant Products and Aqueous Solutions. Scientific Journal “Science Rise”, 4, 116-121.
https://doi.org/10.15587/2313-8416.2014.29402
[14]
Nakashima, M. and Tachikawa, E. (1987) Radiolytic Gas Production from Tritiated Water Adsorbed on Molecular Sieve 5A. Journal of Nuclear Science and Technology, 24, 41-46. https://doi.org/10.1080/18811248.1987.9735772
[15]
Sakumoto, A. and Miyata, T. (1984) Treatment of Waste Water by a Combined Technique of Radiation and Conventional Method. Radiation Physics and Chemistry, 24, 99-115. https://doi.org/10.1016/0146-5724(84)90010-4
[16]
Daniel, G.S. (2021) Sorption Mechanisms of Chemicals in Soils. Soil Systems, 5, Article 13. https://doi.org/10.3390/soilsystems5010013
[17]
Neta, P. and Grodkowski, J. (2005) Rate Constants for Reactions of Phenoxyl Radicals in Solution. Journal of Physical and Chemical Reference Data, 34, 109-199.
https://doi.org/10.1063/1.1797812
[18]
Mustafayev, I., Mammadov, Kh. and Aslanov, F. (2022) Determination of the Concentration of Radon in Water Sources in the “Istisu” Area of Kalbajar. ANAS Institute of Radiation Problems. Materials of the Republican Scientific-Technical Conference, Baku, 28-29 October, 11-15.
[19]
Law of the Republic of Azerbaijan on Radiation Safety of the Population (1977) Legislative Collection of the Republic of Azerbaijan. 11.
